Probability in Genetic Inheritance Quiz

Challenge yourself with questions on genotype, phenotype, genetic disorders, and more. Test your understanding of genetic probability in this quiz.

#1

Which of the following represents the genotype of an individual with two identical alleles for a particular gene?

Heterozygous
Homozygous dominant
Homozygous recessive
Incomplete dominance
#2

What is the probability of rolling an even number (2, 4, or 6) on a six-sided die?

1/2
1/3
1/6
2/3
#3

In a pedigree chart, what symbol is used to represent an unaffected male?

Square
Circle
Filled square
Filled circle
#4

If two individuals with blood type A have a child, what is the possible blood type of the child?

A
B
AB
O
#5

If two heterozygous individuals (Aa) for a trait are crossed, what is the probability of having an offspring with the homozygous recessive genotype (aa)?

1/2
1/4
1/8
1/16
#6

What is the probability of having a male child if the father is hemizygous for a sex-linked recessive trait (XY) and the mother is a carrier?

25%
50%
75%
100%
#7

In a dihybrid cross, how many different gamete combinations can be produced if both parents are heterozygous for two independent traits?

4
8
16
32
#8

In a monohybrid cross between two heterozygous individuals, what is the phenotypic ratio of their offspring?

1:1
3:1
1:2:1
9:3:3:1
#9

What is the term for the phenomenon where one gene can affect multiple phenotypic traits?

Codominance
Polygenic inheritance
Epistasis
Pleiotropy
#10

What is the probability of rolling a sum of 7 with two six-sided dice?

1/6
1/12
1/8
1/36
#11

If two parents are carriers for a recessive genetic disorder, what is the probability that their offspring will have the disorder?

0%
25%
50%
75%
#12

What is the probability of getting heads on a fair coin flip and rolling a 5 on a six-sided die in two independent events?

1/12
1/6
1/4
1/2
#13

If the probability of having a specific genetic disorder is 1/1000, what is the probability of being a carrier for that disorder in the general population?

1%
5%
10%
0.1%
#14

In Mendel's experiments with pea plants, what is the ratio of phenotypes in the F2 generation resulting from a dihybrid cross?

9:3:3:1
3:1
1:2:1
1:1
#15

What is the probability of getting tails on a fair coin flip or rolling a 6 on a six-sided die in two independent events?

1/6
1/3
1/2
2/3

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